From 3b7094fe8329c5c7bb0d685e1876aa30f59bece6 Mon Sep 17 00:00:00 2001 From: Andrey Drobyshev Date: Wed, 22 Nov 2023 14:15:38 +0200 Subject: [PATCH 1/4] iotests: fix default machine type detection The machine type is being detected based on "-M help" output, and we're searching for the line ending with " (default)". However, in downstream one of the machine types s marked as deprecated might become the default, in which case this logic breaks as the line would now end with " (default) (deprecated)". To fix potential issues here, let's relax that requirement and detect the mere presence of " (default)" line instead. Signed-off-by: Andrey Drobyshev Message-ID: <20231122121538.32903-1-andrey.drobyshev@virtuozzo.com> Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf --- tests/qemu-iotests/testenv.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tests/qemu-iotests/testenv.py b/tests/qemu-iotests/testenv.py index e67ebd254b..3ff38f2661 100644 --- a/tests/qemu-iotests/testenv.py +++ b/tests/qemu-iotests/testenv.py @@ -40,7 +40,7 @@ def get_default_machine(qemu_prog: str) -> str: machines = outp.split('\n') try: - default_machine = next(m for m in machines if m.endswith(' (default)')) + default_machine = next(m for m in machines if ' (default)' in m) except StopIteration: return '' default_machine = default_machine.split(' ', 1)[0] From 9fb7b350ba9816ebca8a7614fec486fd4269ab2d Mon Sep 17 00:00:00 2001 From: Fam Zheng Date: Fri, 24 Nov 2023 11:56:54 +0000 Subject: [PATCH 2/4] vmdk: Don't corrupt desc file in vmdk_write_cid If the text description file is larger than DESC_SIZE, we force the last byte in the buffer to be 0 and write it out. This results in a corruption. Try to allocate a big buffer in this case. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1923 Signed-off-by: Fam Zheng Message-ID: <20231124115654.3239137-1-fam@euphon.net> Reviewed-by: Kevin Wolf Reviewed-by: Eric Blake Signed-off-by: Kevin Wolf --- block/vmdk.c | 28 ++++++++++++++++++++-------- tests/qemu-iotests/059 | 2 ++ tests/qemu-iotests/059.out | 4 ++++ 3 files changed, 26 insertions(+), 8 deletions(-) diff --git a/block/vmdk.c b/block/vmdk.c index d87f6d9aaa..d6971c7067 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -351,29 +351,41 @@ vmdk_write_cid(BlockDriverState *bs, uint32_t cid) BDRVVmdkState *s = bs->opaque; int ret = 0; - desc = g_malloc0(DESC_SIZE); - tmp_desc = g_malloc0(DESC_SIZE); - ret = bdrv_co_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); + size_t desc_buf_size; + + if (s->desc_offset == 0) { + desc_buf_size = bdrv_getlength(bs->file->bs); + if (desc_buf_size > 16ULL << 20) { + error_report("VMDK description file too big"); + return -EFBIG; + } + } else { + desc_buf_size = DESC_SIZE; + } + + desc = g_malloc0(desc_buf_size); + tmp_desc = g_malloc0(desc_buf_size); + ret = bdrv_co_pread(bs->file, s->desc_offset, desc_buf_size, desc, 0); if (ret < 0) { goto out; } - desc[DESC_SIZE - 1] = '\0'; + desc[desc_buf_size - 1] = '\0'; tmp_str = strstr(desc, "parentCID"); if (tmp_str == NULL) { ret = -EINVAL; goto out; } - pstrcpy(tmp_desc, DESC_SIZE, tmp_str); + pstrcpy(tmp_desc, desc_buf_size, tmp_str); p_name = strstr(desc, "CID"); if (p_name != NULL) { p_name += sizeof("CID"); - snprintf(p_name, DESC_SIZE - (p_name - desc), "%" PRIx32 "\n", cid); - pstrcat(desc, DESC_SIZE, tmp_desc); + snprintf(p_name, desc_buf_size - (p_name - desc), "%" PRIx32 "\n", cid); + pstrcat(desc, desc_buf_size, tmp_desc); } - ret = bdrv_co_pwrite_sync(bs->file, s->desc_offset, DESC_SIZE, desc, 0); + ret = bdrv_co_pwrite_sync(bs->file, s->desc_offset, desc_buf_size, desc, 0); out: g_free(desc); diff --git a/tests/qemu-iotests/059 b/tests/qemu-iotests/059 index 2bcb1f7f9c..0634c7bd92 100755 --- a/tests/qemu-iotests/059 +++ b/tests/qemu-iotests/059 @@ -84,6 +84,8 @@ echo echo "=== Testing big twoGbMaxExtentFlat ===" _make_test_img -o "subformat=twoGbMaxExtentFlat" 1000G _img_info --format-specific | _filter_img_info --format-specific +$QEMU_IO -c "write 990G 512 -P 89" "$TEST_IMG" | _filter_qemu_io +$QEMU_IO -c "read 990G 512 -P 89" "$TEST_IMG" | _filter_qemu_io _cleanup_test_img echo diff --git a/tests/qemu-iotests/059.out b/tests/qemu-iotests/059.out index 2b83c0c8b6..275ee7c778 100644 --- a/tests/qemu-iotests/059.out +++ b/tests/qemu-iotests/059.out @@ -2032,6 +2032,10 @@ Format specific information: virtual size: 2147483648 filename: TEST_DIR/t-f500.IMGFMT format: FLAT +wrote 512/512 bytes at offset 1063004405760 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) +read 512/512 bytes at offset 1063004405760 +512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) === Testing malformed VMFS extent description line === qemu-img: Could not open 'TEST_DIR/t.IMGFMT': Invalid extent line: RW 12582912 VMFS "dummy.IMGFMT" 1 From 411132c9790aae23f69add2e9f5f129880e079c0 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Mon, 27 Nov 2023 12:57:55 +0100 Subject: [PATCH 3/4] export/vhost-user-blk: Fix consecutive drains The vhost-user-blk export implement AioContext switches in its drain implementation. This means that on drain_begin, it detaches the server from its AioContext and on drain_end, attaches it again and schedules the server->co_trip coroutine in the updated AioContext. However, nothing guarantees that server->co_trip is even safe to be scheduled. Not only is it unclear that the coroutine is actually in a state where it can be reentered externally without causing problems, but with two consecutive drains, it is possible that the scheduled coroutine didn't have a chance yet to run and trying to schedule an already scheduled coroutine a second time crashes with an assertion failure. Following the model of NBD, this commit makes the vhost-user-blk export shut down server->co_trip during drain so that resuming the export means creating and scheduling a new coroutine, which is always safe. There is one exception: If the drain call didn't poll (for example, this happens in the context of bdrv_graph_wrlock()), then the coroutine didn't have a chance to shut down. However, in this case the AioContext can't have changed; changing the AioContext always involves a polling drain. So in this case we can simply assert that the AioContext is unchanged and just leave the coroutine running or wake it up if it has yielded to wait for the AioContext to be attached again. Fixes: e1054cd4aad03a493a5d1cded7508f7c348205bf Fixes: https://issues.redhat.com/browse/RHEL-1708 Signed-off-by: Kevin Wolf Message-ID: <20231127115755.22846-1-kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf --- block/export/vhost-user-blk-server.c | 9 +++++-- include/qemu/vhost-user-server.h | 1 + util/vhost-user-server.c | 39 ++++++++++++++++++++++------ 3 files changed, 39 insertions(+), 10 deletions(-) diff --git a/block/export/vhost-user-blk-server.c b/block/export/vhost-user-blk-server.c index fe2cee3a78..16f48388d3 100644 --- a/block/export/vhost-user-blk-server.c +++ b/block/export/vhost-user-blk-server.c @@ -283,6 +283,7 @@ static void vu_blk_drained_begin(void *opaque) { VuBlkExport *vexp = opaque; + vexp->vu_server.quiescing = true; vhost_user_server_detach_aio_context(&vexp->vu_server); } @@ -291,19 +292,23 @@ static void vu_blk_drained_end(void *opaque) { VuBlkExport *vexp = opaque; + vexp->vu_server.quiescing = false; vhost_user_server_attach_aio_context(&vexp->vu_server, vexp->export.ctx); } /* - * Ensures that bdrv_drained_begin() waits until in-flight requests complete. + * Ensures that bdrv_drained_begin() waits until in-flight requests complete + * and the server->co_trip coroutine has terminated. It will be restarted in + * vhost_user_server_attach_aio_context(). * * Called with vexp->export.ctx acquired. */ static bool vu_blk_drained_poll(void *opaque) { VuBlkExport *vexp = opaque; + VuServer *server = &vexp->vu_server; - return vhost_user_server_has_in_flight(&vexp->vu_server); + return server->co_trip || vhost_user_server_has_in_flight(server); } static const BlockDevOps vu_blk_dev_ops = { diff --git a/include/qemu/vhost-user-server.h b/include/qemu/vhost-user-server.h index 64ad701015..0417ec0533 100644 --- a/include/qemu/vhost-user-server.h +++ b/include/qemu/vhost-user-server.h @@ -45,6 +45,7 @@ typedef struct { /* Protected by ctx lock */ bool in_qio_channel_yield; bool wait_idle; + bool quiescing; VuDev vu_dev; QIOChannel *ioc; /* The I/O channel with the client */ QIOChannelSocket *sioc; /* The underlying data channel with the client */ diff --git a/util/vhost-user-server.c b/util/vhost-user-server.c index 5ccc6d24a0..a9a48fffb8 100644 --- a/util/vhost-user-server.c +++ b/util/vhost-user-server.c @@ -132,8 +132,7 @@ vu_message_read(VuDev *vu_dev, int conn_fd, VhostUserMsg *vmsg) qio_channel_yield(ioc, G_IO_IN); server->in_qio_channel_yield = false; } else { - /* Wait until attached to an AioContext again */ - qemu_coroutine_yield(); + return false; } continue; } else { @@ -201,8 +200,16 @@ static coroutine_fn void vu_client_trip(void *opaque) VuServer *server = opaque; VuDev *vu_dev = &server->vu_dev; - while (!vu_dev->broken && vu_dispatch(vu_dev)) { - /* Keep running */ + while (!vu_dev->broken) { + if (server->quiescing) { + server->co_trip = NULL; + aio_wait_kick(); + return; + } + /* vu_dispatch() returns false if server->ctx went away */ + if (!vu_dispatch(vu_dev) && server->ctx) { + break; + } } if (vhost_user_server_has_in_flight(server)) { @@ -353,8 +360,7 @@ static void vu_accept(QIONetListener *listener, QIOChannelSocket *sioc, qio_channel_set_follow_coroutine_ctx(server->ioc, true); - server->co_trip = qemu_coroutine_create(vu_client_trip, server); - + /* Attaching the AioContext starts the vu_client_trip coroutine */ aio_context_acquire(server->ctx); vhost_user_server_attach_aio_context(server, server->ctx); aio_context_release(server->ctx); @@ -413,8 +419,25 @@ void vhost_user_server_attach_aio_context(VuServer *server, AioContext *ctx) NULL, NULL, vu_fd_watch); } - assert(!server->in_qio_channel_yield); - aio_co_schedule(ctx, server->co_trip); + if (server->co_trip) { + /* + * The caller didn't fully shut down co_trip (this can happen on + * non-polling drains like in bdrv_graph_wrlock()). This is okay as long + * as it no longer tries to shut it down and we're guaranteed to still + * be in the same AioContext as before. + * + * co_ctx can still be NULL if we get multiple calls and only just + * scheduled a new coroutine in the else branch. + */ + AioContext *co_ctx = qemu_coroutine_get_aio_context(server->co_trip); + + assert(!server->quiescing); + assert(!co_ctx || co_ctx == ctx); + } else { + server->co_trip = qemu_coroutine_create(vu_client_trip, server); + assert(!server->in_qio_channel_yield); + aio_co_schedule(ctx, server->co_trip); + } } /* Called with server->ctx acquired */ From 6e081324facf9aeece9c286774bab5af3b8d6099 Mon Sep 17 00:00:00 2001 From: BALATON Zoltan Date: Sat, 25 Nov 2023 15:01:35 +0100 Subject: [PATCH 4/4] ide/via: Fix BAR4 value in legacy mode Return default value in legacy mode for BAR4 when unset. This can't be set in reset method because BARs are cleared on reset so we return it instead when BARs are read in legacy mode. This fixes UDMA on amigaone with AmigaOS. Signed-off-by: BALATON Zoltan Message-ID: <20231125140135.AF6A075A4C3@zero.eik.bme.hu> Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf --- hw/ide/via.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/hw/ide/via.c b/hw/ide/via.c index 2d3124ebd7..3f3c484253 100644 --- a/hw/ide/via.c +++ b/hw/ide/via.c @@ -163,14 +163,19 @@ static uint32_t via_ide_cfg_read(PCIDevice *pd, uint32_t addr, int len) uint32_t val = pci_default_read_config(pd, addr, len); uint8_t mode = pd->config[PCI_CLASS_PROG]; - if ((mode & 0xf) == 0xa && ranges_overlap(addr, len, - PCI_BASE_ADDRESS_0, 16)) { - /* BARs always read back zero in legacy mode */ - for (int i = addr; i < addr + len; i++) { - if (i >= PCI_BASE_ADDRESS_0 && i < PCI_BASE_ADDRESS_0 + 16) { - val &= ~(0xffULL << ((i - addr) << 3)); + if ((mode & 0xf) == 0xa) { + if (ranges_overlap(addr, len, PCI_BASE_ADDRESS_0, 16)) { + /* BARs 0-3 always read back zero in legacy mode */ + for (int i = addr; i < addr + len; i++) { + if (i >= PCI_BASE_ADDRESS_0 && i < PCI_BASE_ADDRESS_0 + 16) { + val &= ~(0xffULL << ((i - addr) << 3)); + } } } + if (addr == PCI_BASE_ADDRESS_4 && val == PCI_BASE_ADDRESS_SPACE_IO) { + /* BAR4 default value if unset */ + val = 0xcc00 | PCI_BASE_ADDRESS_SPACE_IO; + } } return val;